Clip-in prescription eyewear

An adjustable clip-in lens insert assembly for wrap around style frames used in industrial, construction, recreational activities and in the medical arts. The clip-in prescription lens insert assembly has a curved frame structure with a brow bar structure and clip or hook members to fix the prescription lens insert into wrap around style frames. The brow bar and clip member structures are formed of a polymeric material such as nylon or the like to provide a tensioned fit of the clip-in lens insert assembly into the wrap around style frames.

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Description

This application is a Continuation in Part of application Ser. No. 14/943,688, filed on Nov. 17, 2015 which claims the benefit of Provisional Patent Application Ser. No. 62/080,509, filed Nov. 17, 2014; and claims the benefit of Ser. No. 62/480,725, filed Apr. 3, 2017, and which are fully incorporated by reference herein.

BACKGROUND OF THE INVENTION

The present invention relates generally to clip-in prescription lenses for eyewear. Particularly the invention relates to adjustable clip-in prescription lenses for use in a variety of wrap around style eyewear and other styles of eyewear. More particularly, the invention relates to a universally fitting clip-in prescription lens assembly for use in wrap around eyewear, such as sunglasses, safety eyewear, hunting eyewear, medical eyewear, industrial eyewear, 3D viewing eyewear, Google® glasses and the like.

The use of wrap around style eyewear is prevalent in safety and medical related areas as well as for active life styles to protect the side of the wearer's face. For example, safety glasses are common in the industrial and construction trades, in the medical arts, i.e., dental and in use with laser equipment and when engaging in active life styles such as skiing, motor sports and the like. However, the use of wrap around eyewear is limited to those not requiring corrective vision, such as prescription eyeglasses. To overcome this limitation, the providers of the wrap around eyewear may also provide prescription inserts which are configured to be used with the particular eyewear structures provided. For example, magnetic structures and specifically formed inserts have been proposed for use with specified wrap around eyewear. These inserts, however, are costly and inherently limited in use. Although prescription eyewear insert assemblies have been used and proposed in the past, i.e., assemblies having biasing means and having exteriorly positioned clips, these insert assemblies are not suitable for use in wrap around frames. To overcome these limitations and shortcomings, the clip-in prescription eyewear assembly of the present invention provides a universal adjustable structure for use in a variety of wrap around and other eyewear configurations.

SUMMARY OF THE INVENTION

An adjustable clip-in prescription lens insert assembly for wrap around eyewear. The clip-in prescription lens assembly comprises a frame structure having a pair of lens frame members for holding a pair of prescription lenses correcting the vision of the user. The lens frame members may have a predetermined curved configuration to fit within a specified wrap around frame structure. The corrective lenses may include prescriptions for reading purposes, for example. Each lens frame member has a top portion, an inner and an outer frame portion. A deformable brow bar having a predetermined configuration may be fixed at its terminal ends within connector tubes mounted to the inner frame portions of each lens frame member. An adjustable clip or hook member may be fixed to and extend from the top portion of each lens frame member and, in specified embodiments, may be mounted within connector tubes fixed to the outside of the respective lens frame members. The connector tubes fixed to the inside and outside peripheries of the lens frame members are provided to properly position and to distribute forces on the connections of the brow bar and clip hook members when the insert assembly is mounted within the wrap around frame for use. The adjustable clip may have a formed terminal end and the adjustable clip is preferably coated with a silicone coating or a polymeric sleeve, for example.

The adjustable brow bar structure and the adjustable clip members are, in specified embodiments, preferably comprised of a deformable metal or metal alloy and having shape memory and elastic properties such as titanium or a titanium alloy, i.e., a nickel/titanium alloy. The configuration of the adjustable brow bar may be a bow-shaped configuration which allows the brow bar to be adjusted and having three degrees of freedom (x,y,z axes) so that the lenses of the insert assembly may be adjusted in all directions, i.e., in horizontal and rotational directions to thereby conform the clip-in insert assembly with respect to the internal shape of the lens or lenses and the configuration of the wrap around style frames. The insert assembly is preferable a curved structure to provide a spring like or elastic force to the insert assembly when the clip members are secured over the brow bar of the wrap around frames. The frames and connector tubes may be formed of a metallic composition, such as stainless steel, for example. The frame structures may also be formed of a polymeric composition as further discussed below.

The adjustable clip members may be generally hook-shaped structures, each having an upwardly extending curved loop portion and an outwardly sloping terminal end. The clip members are deformable to accommodate the thickness of the brow of the wrap around frame within the curved loop portion of the clip members. The deformable adjustability of the brow bar structure and clip members permits a user to secure the clip-in prescription lens structure to the inside of the wrap around style and other style frames for use in industrial, sporting and medical settings.

In summary, the clip-in prescription of the invention relates to a clip-in eyewear assembly comprising a frame structure having a pair of lens frame members, a deformable brow bar and having adjustable clip or hook members. The brow bar and clip member structures may comprise deformable metal or metal alloys having shape memory properties, such as titanium or titanium alloys. The frame assemblies have a curved configuration which is greater than the curvature of the eyewear frames in which they are mounted. The curved clip-in frame structures provide a spring-like mounting to the inside of the wrap around style frames with which they are used.

The curved configuration of the clip-in eyewear of the invention provides a tensioned and tight fit to the interior of the eyewear, i.e., wrap around eyewear, with which it is used. The present invention may also incorporate the use of a frame, brow bar and clip or hook structures formed of a polymeric material having elastic properties, such as nylon or the like, to thereby provide the tensioned fit of the clip-in eyewear into the wrap around style frames. The associated clip structures may be positioned on the outside of the lens frame members to embrace the wrap around frames and to maintain the frame structure in position on the inside of the wrap around frames.

An advantage of the adjustable clip-in prescription insert assembly of the invention is to provide an economical, easy to use prescription lens structure, adaptable for any wrap around style frame design.

Another advantage of the invention is to provide curved prescription eyeglass inserts that have a pliable and deformable brow bridge and clip members each having shape memory and elastic properties that are adjustable to fit into wrap around frames, for example, 4, 6 and 8 base frames.

These and other advantages of this invention will become clear from the following description by reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a frontal view of the adjustable clip-in prescription insert assembly of the invention;

FIG. 2 is a top view of the adjustable clip-in prescription insert assembly;

FIG. 3 is a perspective view thereof;

FIG. 3A is a perspective view showing the brow bridge of the adjustable insert assembly of FIGS. 1-3;

FIG. 4 is a frontal view of the clip-in prescription lens insert assembly of the invention having round lens frames;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is an enlarged view of the clip member of the clip-in prescription lens insert assembly;

FIG. 7 is a rear view of wrap around safety glasses and showing the clip-in prescription insert assembly mounted therein;

FIG. 8 is a frontal view thereof;

FIG. 9 is a frontal view showing the clip-in prescription insert being placed for use in the wrap around safety glasses of FIGS. 7 and 8;

FIG. 10 is a rear view of wrap around safety glasses and having the clip-in prescription insert assembly mounted therein;

FIG. 11 is a frontal view thereof;

FIG. 12 is a side view thereof;

FIG. 13 is a rear view of wrap around sunglasses and having the clip-in prescription insert assembly mounted therein;

FIG. 14 is a frontal view thereof;

FIG. 15 is a rear view showing the clip-in prescription insert assembly being placed for use in the wrap around sunglasses of FIGS. 13 and 14;

FIG. 16 is a rear view of sunglasses and having the clip-in prescription insert assembly mounted therein;

FIG. 17 is a top view thereof;

FIG. 18 is a perspective view of the clip-in prescription insert assembly of the invention;

FIG. 19 is a top view of the clip-in prescription insert assembly of FIG. 18;

FIG. 20 is a frontal view thereof;

FIG. 21 is a perspective view of the adjustable clip-in prescription insert assembly of the invention;

FIG. 22 is a top view of the adjustable clip-in prescription insert assembly of FIG. 21;

FIG. 23 is a frontal view thereof;

FIG. 24 is a rear view showing the clip-in prescription insert assembly of FIGS. 18-20 being placed for use in wrap around eyewear; and

FIG. 25 is a rear view showing the clip-in prescription insert assembly of FIGS. 21-23 being placed for use in wrap around eyewear.

 DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1-3A, the adjustable clip-in prescription lens insert assembly 10 is shown having a lens frame 11 and a lens frame 12. Prescription lenses 13 and 14 correcting the vision of the user are shown held within lens frames 11 and 12, respectively. Adjustable brow bar 15 is shown connected at its terminal ends to the inside of lens frames 11 and 12 by means of connector tubes 21 and 22, respectively. The terminal ends of the brow bar 15 may be held within the connector tubes 21, 22 by means of crimping and/or the utilization of an adhesive. The connector tubes may be mounted to the lens frames 11 and 12 via welding or the like. The lens frame structures and connector tubes may be formed of a stainless steel composition, for example. In this embodiment, the brow bar 15 is preferably constructed of a pliable, deformable metal composition having shape memory and elastic properties such as titanium, a titanium alloy or the like. The brow bar 15 is shown to have a bow-like configuration for adjustment with respect to the nose bridge of the wrap around frame. The brow bar 15 configuration is exemplary and may be comprised of other shapes. As further discussed below, the configuration, deformability and composition of the brow bar 15 allows the user to adjust the shape of the insert assembly 10 into a multiplicity of configurations to provide a universal fit for wrap around frames. The top view of insert assembly 10 of FIG. 2 shows the lens frames 11 and 12 to be in an angled relationship with respect to each other and the brow bar 15 so as to have a curved insert assembly structure providing a spring like force when mounted to wrap around frames as further discussed below.

FIGS. 1-3A further show lens frames 11 and 12, respectively, to have hook-shaped adjustable clip members 16 and 17 fixed thereto at generally the outside top portions thereof. The terminal ends of the clip members 16 and 17 are shown mounted within connector tubes 23 and 24, respectively, and are held therein as described above with respect to the brow bar 15. The connector tubes 23 and 24 provide for force distribution and provide for the predetermined positioning of the clip members 16 and 17. The clip members 16 and 17 are further shown to have sloped terminal ends 18 and 19 which aid in the forming and installation process of the clip-in insert assembly 10 to the inside of the wrap around frames, for example. The clip members 16 and 17 are preferably also constructed of a deformable metal or alloy having shape memory and elastic characteristics. The clip members are preferably coated with a coating or a polymeric sleeve such as a silicone coating or like composition so as to protect the lenses of the wrap around frames. The clip members 16 and 17 may be spread out for adjustment to fit the size of the wrap around frame brow, i.e., the thickness, for example. As shown particularly in FIGS. 2 and 3, the clip-in insert assembly has an arcuate or curved shape, which provide a spring-like action or tension when mounted to the inside of the wrap around frames, as further discussed below.

Referring further to FIG. 3A, a coordinate system 33 having x, y and z axes is shown with respect to the adjustable brow bar 15. The deformability of the composition of the brow bar structure permits the brow bar 15 configuration to have three degrees of freedom to thereby allow deformability along the x, y, and z axes to thereby permit conformance to a multiplicity of wrap around frame nose piece structures as the clip members are positioned over the brow structure of the frame.

Referring to FIGS. 4 and 5, the adjustable clip-in prescription lens insert assembly 35 is shown having lens frames 36 and 37 holding prescription lenses 38 and 39, respectively, and joined at the respective inner portions of the lens frames by adjustable brow bar 40. The brow bar 40 is shown having a generally bow-like or inverted C-shaped configuration with the terminal leg portions fixed to the inside portions of the lens frames 36 and 37. The inverted C-shaped brow bar 40 has upwardly angled leg portions mounted in connector tubes 41 and 42 and upwardly extending leg portions. The combination of the configuration of the brow bar 40 and the composition of a deformable shape memory and elastic material, such as nitinol (a nickel titanium alloy), for example, allow a user to deform the insert assembly 35 whereby the adjustable brow bar 40 is placed over the nose piece of a desired wrap around frame and to provide the spring like property to the insert assembly.

Referring further to FIGS. 4 and 5, clip members 45 and 46 are shown mounted within connector tubes 43 and 44, respectively, to the outside portions of the lens frames 36 and 37 and are shown to extend upward and outward therefrom so as to position and hold the clip members. The clip members 45 and 46, respectively, have rounded top or loop portions 48 and 49, descending portions 50 and 51, inwardly directed bends 55 and 56 and outwardly extending terminal ends 52 and 53. The enlarged view of the clip member 46 in FIG. 6 shows that the configuration of the clip member allows the adjustable clip members of the prescription inserts to be secured about the top or brow bar of wrap around frame 25, for example, or onto a medical wrap around frame structure. The clip members 45 and 46 are further shown to have a sleeve or coating 54, for example, a silicone, to prevent scratching of the lenses of the wrap around frames.

Referring further to FIG. 6, the hook shaped clip member 46 has a configuration which permits the clip-in insert to be secured within a variety of wrap around and other frame structures. The brow bar fits over the top of the nose piece of the wrap around frame and the hook shaped clips are clipped over the brow bar of the wrap around frame. The curved configuration of the insert frame, when viewed from above, has a sharper curvature than that of the wrap around frame so that the bending of the frame structure causes the brow bar of the insert to be deformed over the nose piece of the wrap around frame and to provide tension. The terminal end of the clip members are shown to extend a substantial distance down the lens frame periphery, the latter providing stability to the insert assembly when mounted within the wrap around frame as shown in FIGS. 7-9, for example.

Referring to FIGS. 7-9, the adjustable clip-in prescription lens insert assembly 10 is shown mounted to the inside of wrap around style frame 25 having a unitary structure with a brow 26, lenses 27 and 28 and nose piece 29. The brow bar 15 of the insert assembly 10 is shown positioned about nose piece 29 of the wrap around style frame 25. Wrap around frames 25 are commonly used for recreational and safety purposes. As shown in FIG. 9, brow bar 15 of the prescription lens insert 10 is being extended over the nose bridge 26 of the frame 25 and clip members 16 and 17 are shown being clamped over the top of the wrap around frame 25. The downward extension of the clip members 16 and 17 and the curved shape of the lens insert assembly provides a spring-like force when clipped and secured within the structure of the wrap around frame 25.

As shown in the drawings, the shape of the generally oval style lens frames 11 and 12 of insert assembly 10 and the shape of the generally circular lens frames 36 and 37 of insert assembly 35 may have a configuration to fit within a particular style of wrap around frame designs, for example, male/female wrap around and male/female fashion 4 and 6 base frames, as known in the art.

Referring to FIGS. 10-12, adjustable clip-in prescription lens insert 10 is shown mounted to the inside of wrap around frame 30. As shown, the brow bar 15 of the clip-in insert assembly 10 is formed to contact nose piece 34 of the wrap around frame 30 and clip members 16 and 17 are shown formed around the brow 31 of the frame 30. The frames may have lenses with loupes commonly used in the medical arts.

FIGS. 13-15 show the adjustable clip-in prescription lens insert assembly 10 held within sunglasses 55 having brow 56 and nose piece 57. FIGS. 16-17 show the insert assembly 10 mounted within sunglasses 60 having brow 61 and nose piece 62. The adjustable clip-in assemblies of the invention are constructed to fit within a range of wrap around and other frame styles having different nose pieces and curvatures. For example, for use in male/female fashion 4 and 6 base frames and providing tighter tension for relatively small brow bar structures and looser tension in foam backed frames.

The adjustable clip-in prescription insert assemblies 10 and 35 are shown having a brow bar with lens frames mounted thereto by means of connector tubes 21, 22 and 41, 41, respectively. The lens frames are further shown disposed angularly and inwardly with respect to the brow bar, whereby the clip members, also shown mounted within connector tubes to the outside upper periphery of the respective lens frames, are shown spatially inward with respect to the brow bar so that when secured to the inside of a wrap around frame the spring action or tension of the frame structure of the assemblies hold and secure the insert assembly within the wrap around frames.

In summary, the clip-in prescription eyewear of the invention discussed above provides means for a user's corrective eye lens prescription to be fitted to the inside of any style wrap around frame structure. The clip-in prescription eyewear utilizes a frame with a brow bar and clips or hooks which are deformable and have shape memory and elasticity characteristics to provide adjustable frames for wrap around style frames.

In FIGS. 18-20 and FIGS. 21-23, clip-in eyewear structures 65 and 75 are shown having configurations adapted for use with predetermined wrap around style eyewear. Although the clip-in eyewear structures of embodiments 65 and 75 utilize plastic or polymeric materials, the function of the eyewear is the same as the clip-in eyewear embodiments shown and discussed with respect to FIGS. 1-20. Specifically, the tensioned engagement of the clip-in eyewear as a result of its curved frame structure and use of the adjustable elastic brow bar structures and externally mounted end clips provide the tensioned and tight fit of the clip-in prescription eyewear to the inside of the wrap around style eyewear.

Referring to FIGS. 18-20, the adjustable clip-in prescription lens insert assembly 65 is shown having a lens frame 66 and a lens frame 67. Brow bar 68 is shown interconnecting the lens frames 65 and 66 and clip or hook members 69 and 70 are shown extending outwardly from generally the top side portion of the lens frame members 66 and 67, respectively. The insert assembly 65 is shown to have a curved configuration and may be entirely constructed of a polymeric material. The brow bar 68 is a polymeric structure having grooves 71 and 72 formed into the outside surface of the brow bar to thereby provide an elastic or “live” feature to the curved frame assembly 65. The grooves 71 and 72 are shown to be adjacent the inside of the lens frame members 66 and 67 and which provide for the ease of attaching the curved frame assembly 65 to the inside of the wrap around eyewear.

As shown particularly in FIG. 19, the clip-in eyewear assembly 65 has a curved configuration and having hook members 69 and 70 which are utilized to clip onto the wrap around eyewear as further shown in FIG. 24. The elastic property of the polymeric hook members 69 and 70 provide for the ease of engagement of the clip in eyewear 65 into the wrap around eyewear 73

Referring to FIGS. 21-23, the adjustable clip-in prescription lens insert assembly 75 is shown having a lens frame 76 and a lens frame 77 and which are further shown joined by brow bar 78. The assembly 75 is shown to have a curved configuration. The brow bar 78 is formed of a polymeric material, such as nylon or the like, and is shown to have grooves 81 and 82 on the outside of the brow bar which provide a “living” hinge arrangement to the insert assembly 75. Shown extending from the outside of the lens frames 76 and 77 are clip members 79 and 80, respectively. The clip members 79 and 80 have slots 83 and 84, respectively, which engage the bottom of the lenses of the wrap around frames 85 shown in FIG. 25. The utilization of the polymeric material provide for an elastic, tough and light weight assembly which is easily mounted to the inside of the wrap around eyewear.

The clip-in insert assembly embodiments discussed above utilize metal and polymeric components to form clip-in insert assemblies having curved structures that provide a spring like force when mounted for securement to the inside of wrap around style frames. It is within the purview of the invention that metal and polymeric components may both be utilized to form a clip-in insert assembly which provides the deformity and elasticity required to mount the curved insert assembly within the wrap around style frame. For example, clip-in structures using both metal and polymeric components, including brow bar and clip structures.

As many changes are possible to the clip-in prescription eyewear embodiments of this invention utilizing the teachings thereof, the descriptions above, and the accompanying drawing should be interpreted in the illustrative and not in the limited sense.

Claims

1. An adjustable clip-in prescription lens insert assembly for a curved wrap around style frame said adjustable clip-in prescription lens insert assembly comprising:

a) a curved frame having a pair of lens frame members for holding a pair of prescription lenses, each said lens frame member having a top, outside and inner frame portion, said curved frame further having a curvature greater than base 4, said pair of lens frame members fully surrounding and holding said pair of prescription lenses;
b) a unitary and adjustable brow bar structure having an outside surface and being fixed to said inner frame portions of said pair of lens frame members, said brow bar structure constructed of a deformable and elastic material, said unitary brow bar structure further having two grooves in said outside surface, one said groove being adjacent each said lens frame member and extending from an upper portion of the brow bar structure to a lower portion of the brow bar structure; and
c) a pair of outwardly extending adjustable clip members, one of said adjustable clip members being attached to said outside portion of each said lens frame member and each said adjustable clip member having a slot therein and being constructed and arranged to engage the outside of a curved wrap around style frame, said slot of each said clip member being spaced from said outside portion of said lens frame, said curvature greater than base 4 of said curved frame and said grooves in said brow bar structure cooperatively providing a spring-like mounting as said slots of said clip members are placed in position.

2. The adjustable clip-in prescription lens insert assembly of claim 1, wherein said unitary brow bar structure is comprised of a deformable polymeric composition.

3. The adjustable clip-in prescription lens insert assembly of claim 2, wherein said deformable polymeric composition is a nylon.

4. The adjustable clip-in prescription lens insert assembly of claim 1, wherein said adjustable clip member is constructed of a deformable polymeric composition.

5. The adjustable clip-in prescription lens insert assembly of claim 4, wherein said adjustable clip member is comprised of a nylon.

6. An adjustable clip-in prescription lens insert assembly for a wrap around style frame having a curved configuration, the insert comprising:

a) a frame having a pair of lens frame members for holding a pair of prescription lenses, each said lens frame member having a top, outside and inner frame portion, said frame having a curved configuration greater than base 4 when viewed from the top;
b) a pliable unitary brow bar structure having an outside surface and being fixed to said inner frame portions of said pair of lens frame members, wherein said pliable unitary brow bar structure has a pair of grooves extending into said outside surface to facilitate deformation of said brow bar structure, one said groove being disposed adjacent each said lens frame member, said pair of grooves and said curvature greater than base 4 cooperatively providing a spring-like mounting of the insert to the inside of the wrap around style frame; and
c) a single adjustable clip member extending outward said outside portion of each lens frame member and having a slot therein, said slot in said adjustable clip member extending outwardly said outside frame portion.

7. The adjustable clip-in prescription lens insert assembly of claim 6, wherein said pliable brow bar structure comprising a deformable polymeric composition, and wherein said polymeric composition of said brow bar structure is a nylon.

8. The adjustable clip-in prescription lens insert assembly of claim 6, wherein each said adjustable clip member is constructed of a polymeric composition.

9. The adjustable clip-in prescription lens insert assembly of claim 8, wherein said polymeric composition is a nylon.

10. The adjustable clip-in prescription lens insert assembly of claim 6, wherein said pliable brow bar structure is formed of homogenous material.

11. The adjustable clip-in prescription lens insert assembly of claim 6, wherein the wrap around style frame has a nose piece and wherein said pliable unitary brow bar structure has a configuration to extend over the nose piece when said clip-in prescription lens insert assembly is mounted within the wrap around style frame.

12. An adjustable clip-in prescription lens insert assembly for a wrap around style frame, said adjustable clip-in prescription lens insert assembly comprising:

a) a frame having a pair of lens frame members for holding a pair of prescription lenses, each said lens frame member having a top, outside and inner frame portion, said frame having a curved configuration greater than base 4 when viewed from the top;
b) a pliable unitary brow bar structure having an outside surface and being fixed to said inner frame portions of said pair of lens frame members, said pliable unitary brow bar structure further having at least one groove extending into said outside surface, said at least one groove extending from an upper portion of said brow bar structure to a lower portion of said brow bar structure, to facilitate deformation of said brow bar structure; and
c) a pliable clip member extending outward said outside portion of each said lens frame member, said pliable clip member having a slot therein adjacent said outside portion of each said lens frame member.

13. The adjustable clip-in prescription lens insert assembly of claim 12, said pliable brow bar structure comprising a deformable polymeric composition, and wherein said polymeric composition of said brow bar structure is a nylon.

14. The adjustable clip-in prescription lens insert assembly of claim 12, wherein each said pliable clip member is constructed of a polymeric composition.

15. The adjustable clip-in prescription lens insert assembly of claim 14, wherein said pliable polymeric composition is a nylon.

16. The adjustable clip-in prescription lens insert assembly of claim 12 wherein said frame, brow bar structure and each said clip member extending from each maid lens frame member me formed of a polymeric composition.

17. The adjustable clip-in prescription lens insert assembly of claim 12, wherein said pliable brow bar structure is a formed of homogenous material.

Referenced Cited
U.S. Patent Documents
2976767 March 1961 McNeill
3052160 September 1962 Ratti
5274404 December 28, 1993 Michael
6749299 June 15, 2004 Hsu
7753518 July 13, 2010 Lam
7866812 January 11, 2011 Tullis
7931364 April 26, 2011 Wilson
9690120 June 27, 2017 Barrows
Patent History
Patent number: 10451898
Type: Grant
Filed: Jun 1, 2017
Date of Patent: Oct 22, 2019
Inventor: Andrew Barrows (Maple Grove, MN)
Primary Examiner: Zachary W Wilkes
Application Number: 15/611,385
Classifications
Current U.S. Class: Spring Biased Or Secured By Friction Members (351/58)
International Classification: G02C 9/04 (20060101); G02C 5/06 (20060101);